Polymerized organosiloxanes decorated onto carbon nanofibers forming shish-kebab architectures under highly alkaline conditions

Decoration of polymers onto nanoparticles has drawn much scientific and technological interest due to the potential for directed assembly of large-scale nanoarchitectures. However, there have been no previous reports on such decoration of polymers derived from highly-ordered inorganic–organic nanolayered features that have the potential to chemically bond to the nano-reinforcement. In this work, polymers derived from octadecyltrimethoxysilane (ODMS) were successfully decorated onto carbon nanofibers (CNFs) yielding unique hybrid shish-kebab structures. Interestingly, only under highly alkaline conditions were shish-kebab structures formed onto the CNFs. Chemical characterization of the polymeric shish-kebab structure was performed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and nuclear magnetic resonance (NMR), indicating extended hydrocarbon chains with crosslinking of the siloxane groups. For the siloxane polymer with the distinctive shish-kebab forming structure, NMR results showed that there was an incomplete reaction of siloxane groups, which may have facilitated heterogeneous crystallization of the polymer onto the Ox-CNFs. Potential applications for these unique nanohybrid structures are discussed.

Graphical abstractSurface treatment of octadecyltrimethoxysilane (ODMS) onto carbon nanofibers (CNFs) under highly alkaline conditions led to distinctive, polymerized octadecyltrimethoxysilane (PODS)-CNF shish kebab structures.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Organosiloxane patterned shish-kebab structures were formed onto carbon nanofibers. ► This patterned polymer contains highly-ordered inorganic–organic hybrids. ► Only under highly alkaline conditions were such patterned structures obtained. ► Such hierarchical structures may have potential for nanocomposite applications.